Boris Johnson today warned No 10 it must plough cash into London to secure Britain's recovery as he set out his vision to make it the "greatest city on earth".

The Mayor used his speech at City Hall this morning as a massive publicity plug for investment into transport.

He was 'laying out' his vision for what London will look like by 2020 but he warns that the population in the city will have risen up to ten million, so he was calling for an investment in everything from housing to education.

Boris Johnson reiterated his support for Crossrail 2 and the Thames gateway Airport as well as other transport such as the tube.